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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0001486594-10-000003.txt : 20100728
<SEC-HEADER>0001486594-10-000003.hdr.sgml : 20100728
<ACCEPTANCE-DATETIME>20100728172631
ACCESSION NUMBER:		0001486594-10-000003
CONFORMED SUBMISSION TYPE:	D
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
FILED AS OF DATE:		20100728
DATE AS OF CHANGE:		20100728
EFFECTIVENESS DATE:		20100728

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FAIR ISAAC CORP
		CENTRAL INDEX KEY:			0000814547
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-BUSINESS SERVICES, NEC [7389]
		IRS NUMBER:				941499887
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		D
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-145606
		FILM NUMBER:		10975143

	BUSINESS ADDRESS:	
		STREET 1:		901 MARQUETTE AVENUE
		STREET 2:		SUITE 3200
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55402
		BUSINESS PHONE:		(612) 758-5255

	MAIL ADDRESS:	
		STREET 1:		901 MARQUETTE AVENUE
		STREET 2:		SUITE 3200
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55402

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FAIR ISAAC & COMPANY INC
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
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<TYPE>D
<SEQUENCE>1
<FILENAME>primary_doc.xml
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        <cik>0000814547</cik>
        <entityName>FAIR ISAAC CORP</entityName>
        <issuerAddress>
            <street1>901 MARQUETTE AVENUE</street1>
            <street2>SUITE 3200</street2>
            <city>MINNEAPOLIS</city>
            <stateOrCountry>MN</stateOrCountry>
            <stateOrCountryDescription>MINNESOTA</stateOrCountryDescription>
            <zipCode>55402</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>(612) 758-5255</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
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            <previousName>FAIR ISAAC &amp; COMPANY INC</previousName>
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            <overFiveYears>true</overFiveYears>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Mark</firstName>
                <middleName>N.</middleName>
                <lastName>Greene</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>901 Marquette Avenue</street1>
                <street2>Suite 3200</street2>
                <city>Minneapolis</city>
                <stateOrCountry>MN</stateOrCountry>
                <stateOrCountryDescription>MINNESOTA</stateOrCountryDescription>
                <zipCode>55402</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
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            <relationshipClarification></relationshipClarification>
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            <relatedPersonName>
                <firstName>Thomas</firstName>
                <middleName>A.</middleName>
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                <firstName>Charles</firstName>
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                <street2>Suite 3200</street2>
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                <stateOrCountry>MN</stateOrCountry>
                <stateOrCountryDescription>MINNESOTA</stateOrCountryDescription>
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            <relatedPersonRelationshipList>
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            <relationshipClarification></relationshipClarification>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Richard</firstName>
                <middleName>S.</middleName>
                <lastName>Deal</lastName>
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                <street1>901 Marquette Avenue</street1>
                <street2>Suite 3200</street2>
                <city>Minneapolis</city>
                <stateOrCountry>MN</stateOrCountry>
                <stateOrCountryDescription>MINNESOTA</stateOrCountryDescription>
                <zipCode>55402</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Andrew</firstName>
                <middleName>N.</middleName>
                <lastName>Jennings</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>901 Marquette Avenue</street1>
                <street2>Suite 3200</street2>
                <city>Minneapolis</city>
                <stateOrCountry>MN</stateOrCountry>
                <stateOrCountryDescription>MINNESOTA</stateOrCountryDescription>
                <zipCode>55402</zipCode>
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            <relatedPersonRelationshipList>
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            <relationshipClarification></relationshipClarification>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Richard</firstName>
                <middleName>A.</middleName>
                <lastName>Stewart</lastName>
            </relatedPersonName>
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                <street1>901 Marquette Avenue</street1>
                <street2>Suite 3200</street2>
                <city>Minneapolis</city>
                <stateOrCountry>MN</stateOrCountry>
                <stateOrCountryDescription>MINNESOTA</stateOrCountryDescription>
                <zipCode>55402</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Michael</firstName>
                <middleName>J.</middleName>
                <lastName>Pung</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>901 Marquette Avenue</street1>
                <street2>Suite 3200</street2>
                <city>Minneapolis</city>
                <stateOrCountry>MN</stateOrCountry>
                <stateOrCountryDescription>MINNESOTA</stateOrCountryDescription>
                <zipCode>55402</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Christopher</firstName>
                <middleName>J.</middleName>
                <lastName>Rence</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>901 Marquette Avenue</street1>
                <street2>Suite 3200</street2>
                <city>Minneapolis</city>
                <stateOrCountry>MN</stateOrCountry>
                <stateOrCountryDescription>MINNESOTA</stateOrCountryDescription>
                <zipCode>55402</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>A. George</firstName>
                <lastName>Battle</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>901 Marquette Avenue</street1>
                <street2>Suite 3200</street2>
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                <stateOrCountry>MN</stateOrCountry>
                <stateOrCountryDescription>MINNESOTA</stateOrCountryDescription>
                <zipCode>55402</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Nicholas</firstName>
                <middleName>F.</middleName>
                <lastName>Graziano, III</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>901 Marquette Avenue</street1>
                <street2>Suite 3200</street2>
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                <stateOrCountry>MN</stateOrCountry>
                <stateOrCountryDescription>MINNESOTA</stateOrCountryDescription>
                <zipCode>55402</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Alex</firstName>
                <middleName>W.</middleName>
                <lastName>Hart</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>901 Marquette Avenue</street1>
                <street2>Suite 3200</street2>
                <city>Minneapolis</city>
                <stateOrCountry>MN</stateOrCountry>
                <stateOrCountryDescription>MINNESOTA</stateOrCountryDescription>
                <zipCode>55402</zipCode>
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            <relatedPersonRelationshipList>
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            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <middleName>D.</middleName>
                <lastName>Kirsner</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>901 Marquette Avenue</street1>
                <street2>Suite 3200</street2>
                <city>Minneapolis</city>
                <stateOrCountry>MN</stateOrCountry>
                <stateOrCountryDescription>MINNESOTA</stateOrCountryDescription>
                <zipCode>55402</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>William</firstName>
                <middleName>J.</middleName>
                <lastName>Lansing</lastName>
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            <relatedPersonAddress>
                <street1>901 Marquette Avenue</street1>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Rahul</firstName>
                <middleName>N.</middleName>
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                <street1>901 Marquette Avenue</street1>
                <street2>Suite 3200</street2>
                <city>Minneapolis</city>
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                <firstName>Duane</firstName>
                <middleName>E.</middleName>
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    <offeringData>
        <industryGroup>
            <industryGroupType>Other Banking and Financial Services</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Over $100,000,000</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
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            <dateOfFirstSale>
                <value>2010-07-14</value>
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        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
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        <typesOfSecuritiesOffered>
            <isDebtType>true</isDebtType>
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        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>500000</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>245000000</totalOfferingAmount>
            <totalAmountSold>245000000</totalAmountSold>
            <totalRemaining>0</totalRemaining>
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        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>24</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
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                <dollarAmount>0</dollarAmount>
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                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
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                <dollarAmount>0</dollarAmount>
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        </useOfProceeds>
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            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>FAIR ISAAC CORP</issuerName>
                <signatureName>/s/ Mark R. Scadina</signatureName>
                <nameOfSigner>Mark R. Scadina</nameOfSigner>
                <signatureTitle>EVP, General Counsel &amp; Secretary</signatureTitle>
                <signatureDate>2010-07-27</signatureDate>
            </signature>
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